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General expanded form of (x+y+z)^k

  1. Apr 19, 2014 #1
    (hope it doesn't seem so weird),
    I'm looking for a general expanded form of
    [itex](x+y+z)^{k}[/itex], [itex]k\in N[/itex]





    The elements are obviously determined by combinations of their powers, which sum is always [itex]k[/itex].
    I just cannot find the algorithm for element's constants.
    Last edited by a moderator: Apr 19, 2014
  2. jcsd
  3. Apr 19, 2014 #2
  4. Apr 20, 2014 #3
    Thanks, I completely forgot to check out the factorials :)
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